Electric-arc lamp.



. J. A. HEANY.

ELEGTRlG ARC LAMP.

Patented July 23, |90|Q (Application filed Jan. 28, 1901.) (No Model.) 2Sheets-Sheet I;

Patented July 23, I90l.

J. A. HEANY.

ELECTRIC ARC LAMP. (Appication filed Jan. 28. 1901.;

2 Sheetg-Sheet 2..

(No Model.)

UNrrED' STATES PAT NT Enron.

JOHN A. HEANY, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THETETER-HEANY DEVELOPING COMPANY, OF SAME PLACE AND CHARLES- TON, WESTVIRGINIA.

ELECTRIC-ARC LAM P.

SPECIFICATION forming part of Letters Patent No. 678,876, dated July 23,1901.

Application filed January 28, 1901. Serial No. 44,997. (No model.)

To all whom it may concern.-

Be it known that I, JOHN A. HEANY, a citizen of the United States,residing at the city of Philadelphia, in the county of Philadelphia andState of Pennsylvania, haveinvented certain newandusefulImprovementsinElectric- Arc Lamps, of which the following is a specification.

My invention has relation to an electric-arc lamp, and in suchconnection it relates to the construction and arrangement of partsconstituting such a lamp.

The principal objects of my invention are, first, to provide in anelectric-arc lamp an improved feeding mechanism for the upper carbon;second,to provide an improved holder or support for the upper carbon,and, third, to improve certain other parts, whereby the efficiency anddurability of the lamp are increased and its cost of constructionmaterially lessened.

The nature and scope of my invention will be more fully understood fromthe following description, taken in connection with the accompanyingdrawings, forming part hereof, in which Figure 1 is a vertical sectionalview of an electric-arc lamp embodying main features of my invention.Fig. 2 is a cross-sectional View on the line 0000 of Fig. 1. Fig. 3 is asimilar view on the line y y of Fig. 1. Fig. 4 is a detail view of thehinged solenoid-core and auxiliaries constituting the clutch and feedingmechanism for the upper carbon. Fig. 5 is a cross-sectional View on theline 5 5 of Fig. 4. Fig. 6 is a perspective .view of the platesupporting the globe of the lamp; and Figs. 7 and 8 are detail views,enlarged, illustrating the construction and arrangement of the supportfor the upper carbon.

Referring to the drawings, a represents a tubular standard, to the upperend of which a cap a is secured, said cap having an eye a by means ofwhich thelamp may be suspended from a suitable support. To the tubularstandard a is secured the spool 12 of a solenoid-coil b, the-exterior ofthe coil 1) being wrapped with a resistance 5 To the lower end of thestandard a is secured a plate 11, having its rim or edge upwardlyflanged, as

at d and d". The rim d is inclined from right to left, Whereas the rim dis inclined in a reverse direction to form two oppositelyarrangedinclined or cam surfaces, as clearly illustrated in Fig. 6. The plate dhas at two diametrically opposite points a slot or recess 02 which iscut into the plate at each point where the inclination of the rim (1 andof the rim d begins. These recesses d are cut out to permit of thepassage of two lugs e, formed on the interior of a ring e, the lugs epassing through the recesses (1 until they rest upon the cams d and dWhen in this position, if the ring 6 be turned from left to right itslower flanged edge 6 will be drawn upward against the base of the platecl. This flanged edge e is arranged to receive and support the upperflanged open end of a bell-shaped globe g, within which the carbons hand h are adapted to be consumed. Vhen, therefore, the ring e is turnedin one direction, the globe 9 will be tightly clamped to the plate 61;but when the ring 6 is turned in reverse direction until its lugs eregister with the slots d then the ring 6 and globe g may be drawn downout of engagement with the plate (1. Concentric with and arranged withinthe tubular standard a is a tube m, arranged to re ceive and to guidethe holder for the upper carbon h and to permit the holder and carbon toslide up and down. The holder for this upper carbon comprises a thimblem, having an open base and having its interior conical. Within thisthimble m is confined two pieces m forming together a second splitthimble, having a conical exterior and a cylindrical interior adapted toreceive the carbon h. When the split thimble m is not expanded by theinsertion of the carbon h, it slips down in the thimble m and rests upona flanged base or ledge m of the thimble m. When, however, the carbon his inserted in the split thimble m said thimble m is expanded until itfits snugly in the first thimble m. When the carbon and thimble m aredriven upward into the thimble m, the sections of the thimble m arecompressed to tightly bind and hold the carbon. If the carbon h ispulled down, the split thimble m is drawn down in the thimble m until itcan expand sufficiently to release the carbon h. Between the standard aand the tube m is arranged the core n for the solenoid. This core or issplit from end to end into two semitubular sections or members. The twocoresections are pivoted or hinged together, as at it, at a point nearthe base of each section, and each section is tapered from its basetoward its upper end, so that the greater thickness of metal is at thebase, whereas the top of each section is thinnest. This tapering is fora twofold purpose-namely, to decrease the thickness of the wall of thecore a at its upper end, so that the sections may vibrate within thetubes to and on with greater freedom and to a greater extent, and toincrease the thickness and consequent Weight of the core at its base, sothat it will readily drop by gravity and will readily grip the carboneven if a slight movement of the relatively thick jaws inward results.At the base of each section of the core 11 is formed a semicirculargripping-jaw n adapted when the upper end of each section is attractedoutward by the magnetization or energizing of the solenoid-coil b toapproach and bite against the carbon h. The sectioned core or hastherefore two movements imparted to it by the energization of the coilZ)one which results from the attraction of the upper ends of the coreand a succeeding movement of the entire core upward in the space betweenthe tubes at and in. These two movements result in the gripping orsecuring of the carbon h to the core at and the movement upward of thecarbon 7b and core it to permit the carbon h to separate from the carbonh. hen the sectional core a is not under the influence of the coil Z),it will drop by gravity toward the plate cl. The extent of this downwardmovement maybe regulated byadjusting the two set-screws d", the innerends of which are arranged to bear upon the under surface of thecore-sections a at points it, which are at or near the outer peripheryof each section. By causing the sections it to strike the screws 61 atthese points it" the dropping of the core n will cause its upper ends toswing inwardly toward the inner tube m and to cause the lower ends ofsaid sections to separate and release the carbon 71. The lower carbon his supported by a curved arm or bracket 0, depending within the globe gand secured at its upper end to the plate cl, from which it is properlyinsulated.

The circuit through the lamp is as follows: The current enters from themain line by the wire 29, then traverses the solenoid-coil Z), emergingby the wire 19, which is connected electrically with the cap a and tubes0, and m. The cap a is connected with the support wire 29 which entersthe resistance 71 and emerges therefrom by the wire 19 which leads tothe return wire of the main line.

Having thus described the nature and objects of my invention, what Iclaim as new, and desire to secure by Letters Patent, is-- 1. In anelectric-arc lamp, a solenoid-coil, a tube uniting the coil to the otherparts of the lamp, a tubular core divided its entire length into twosemitubular sections, the walls of which taper upward, said sectionsbeing pivoted together near the base and pro vided with gripping-jawsarranged below the pivotal connection, said tubular core adapted toslide in the tube uniting the solenoid-coil to the other parts of thelamp, and two adjusting-screws adapted to be advanced in the tube and toimpinge upon the under face of the base of the core-sections, at or nearthe periphery of said core, whereby the downward movement of the core inthe tube may be limited and the upper ends of the sections forced awayfrom the walls of the tube to release the lower gripping-jaws of thecore, substantially as and for the purposes described.

2. In an electric-arc lamp, a support for the upper carbon, comprising athimble having a conical interior and a thimble divided or split intotwo sections and having a conical exterior, said split thimble adaptedto receive the upper carbon and to be advanced in the other thimble totightly clamp said carbon, substantially as and for the purposesdescribed.

3. In an eleetric-arc lamp, a ring provided on its interior with twodiametrically -arranged lugs and having a lower flange or ledge, a globeadapted to be supported on said ledge, and a plate having two rims, theupper faces of which are oppositely inclined, said lugs adapted to enterthe slots of said plate and to turn in said inclined rims to lock thering'and globe to said plate, substantially as and for the purposesdescribed.

In testimony whereof I have hereunto set my signature in the presence oftwo subscribing witnesses.

JOHN A. IIEANY.

Witnesses:

J. WALTER DOUGLASS, THOMAS M. SMITH.

